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प्रश्न
What is an indicator?
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उत्तर
An acid-base indicator is a chemical substance that indicates the acidic or basic nature of a solution by a suitable colour change.
संबंधित प्रश्न
What effect does the concentration of H+ (aq) ions have on the nature of the solution?
Sodium hydroxide turns blue litmus red.
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
What colour does the following indicator turn when added to a base or alkali (such as sodium hydroxide)?
Litmus
Why should curd and other sour foodstuffs (like lemon juice, etc.) not be kept in metal containers (such as copper and brass vessels)?
What colour would the universal indicator show in an aqueous solution of sugar? Why?
How does an antacid work?
Name two common antacids.
The daffodil plants grow best in a soil having a pH range of 6.0 to 6.5. If the soil in a garden has a pH of 4.5, which substance needs to be added to the soil in order to grow daffodils?
